Some of the fonts I uploaded to illustrator appear with an orange exclamation mark. On added fonts it says “Preview not available” and when I use the font, at first it appears on the text but when I clic anywhere else the text goes back to default and the exclamation point appears. It seems to happen randomly as I installed 5 fonts yesterday from the same studio and only one of them has this problem. I would try installing them again, but I cant uninstall them first